package com.aqie.appletserver.interceptors;

import com.aqie.appletserver.bean.response.TokenResponse;
import com.aqie.appletserver.context.TokenContext;
import com.aqie.appletserver.service.IBaiduTokenService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Slf4j
public class BaiduTokenInterceptor implements HandlerInterceptor {
    @Autowired
    private IBaiduTokenService baiduTokenService;
    /**
     * 预处理回调方法，实现处理器的预处理
     * 返回值：true表示继续流程；false表示流程中断，不会继续调用其他的拦截器或处理器
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        System.out.println("开始拦截.........");
        //业务代码
        // 获取token; 并保存到ThreadLocal
        TokenResponse authToken = baiduTokenService.getAuthToken();
        if(authToken != null){
            String accessToken = authToken.getAccessToken();
            log.info("baiduToken: {}", accessToken);
            TokenContext.setToken(accessToken);
            return true;
        }else {
            log.info("token 获取失败");
            return false;
        }
    }

    /**
     * 后处理回调方法，实现处理器（controller）的后处理，但在渲染视图之前
     * 此时我们可以通过modelAndView对模型数据进行处理或对视图进行处理
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) throws Exception {
        // TODO Auto-generated method stub

    }
    /**
     * 整个请求处理完毕回调方法，即在视图渲染完毕时回调，
     * 如性能监控中我们可以在此记录结束时间并输出消耗时间，
     * 还可以进行一些资源清理，类似于try-catch-finally中的finally，
     * 但仅调用处理器执行链中
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        // TODO Auto-generated method stub

    }

}
